CIDESCO Exam Prep Questions with Correct Answers

I Biological and non-biological substances both need oxygen for their existence. II The human body consists only of biological substances. Correct Answer I is correct and II is incorrect Characteristics of life include: Correct Answer growth and metabolism Examples of synthetic substances are: Correct Answer plastics and silicones Examples of organic biological substances are: Correct Answer carbohydrates and fats Examples of mineral substances are: Correct Answer paraffins and petroleum Matter is everything that: Correct Answer occupies space and has weight The three forms of matter are solids, liquids and: Correct Answer gases What property does all matter have? Correct Answer All matter has weight Condensation is the change of matter from: Correct Answer a gas to a liquid Vapourisation is the change of matter from: Correct Answer liquid to a gas Melting is the change of matter from: Correct Answer a solid to a liquid Sublimation is the change of matter from: Correct Answer a solid to a gas Condensation is: Correct Answer the change of a vapour to a liquid The alteration of the properties of matter without the formation of any new substance is called a/an: Correct Answer physical change The immediate change of a solid into a vapour is called: Correct Answer sublimation An example of a single-celled cellular organism is: Correct Answer a bacterium I. A micro-organism is the smallest part of the human body. II All micro-organisms need nutrients for their existence. Correct Answer I is incorrect and II is correct Examples of bacteria are: Correct Answer bacilli and cocci I. Every living organism needs some non-biological substances for it's existence. II. All non-biological substances are found as minerals in the earth. Correct Answer I is correct and II is incorrect Science deals mainly with: Correct Answer physics and chemistry The study of the structure of the body is called: Correct Answer anatomy The study of the functions of living organisms is: Correct Answer physiology I Anatomy is a very important science in the field of biology. II Anatomy is the science which deals with the functions of the human body. Correct Answer I is correct and II is incorrect I Physiology is a very important science in the field of biology. II Physiology is the science which deals with the functions of the body. Correct Answer I and II are both correct Which one of the following belongs to the science of chemistry? Correct Answer The alteration of the structure of molecules I Chemical reactions only take place outside and not inside a living organism. II The structure of molecules change during chemical reactions. Correct Answer I is incorrect and II is correct The field of physics includes: Correct Answer heat and electricity Which one of the following belongs to the field of physics? Correct Answer Sound, electricity and heat The field of physics includes: Correct Answer the science of electricity An anion is: Correct Answer A negatively charged atom An anion is: Correct Answer a negatively charged chloride atom (CI-) A cation is: Correct Answer A positively charged sodium atom (Na+) An electrolyte is: Correct Answer A substance which, dissolved in water, splits into ions Examples of electrolytes are: Correct Answer acids and salts An example of an electrolyte is: Correct Answer salt-solution An acid is an electrolyte because: Correct Answer it can conduct an electric current